Wrench.



PATENTBD Q01". 1, 1907.4v

C.l T. HOLMAN.

WRENCH. APPLIOATION FILED JUNE 29, 1907.

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CHARLFS THEOFLUS HOLMAN, OF MEADVILLE, PENNSYLVANIA.

'WRENCH- TQaZZihQMt.tie/@Mim i nthatl, CHARLES A'lHnoFLUs HOLMAN, acitiz'en. of the-Unite`d Statesfresidingat Meadville, ijthe'" ountyl 'oi Crawford and lState of -Pennsylvania, 'i `entell,ilnew andfusefulk,Improvements .i'n

Vi ynchesgoiwhich the following. is va specification.`

wrench is adapted to firmly grip an object without possibility of slippage.-

In the drawings accompanying and forming part of this specification I show in detail one form of embodi-4 ment of the invention which, to enable those skilled in the art to practice the same, will be set forth in de'- tail in the following description, While the novelty of the invention will be included in the claims succeeding said description.

Referring to said drawings: .Figure 1 is a perspective v view of said wrench. Fig. 2 is a longitudinal sectional view of the same, and Fig. 3 is a detail view in perspective of the pawl shown in the preceding figures, and operating spring therefor.

Like characters refer to like parts throughout vthe several ligures of the drawings.

Thev wrench shown involves in its make-up a shank and preferably are as usual integral.

The movable or slidable jaw is denoted by 4 and it is 'provided with a sleeve as 5 inclosing and longitudinally movable upon the shank or main portion-2.

t The shank 2 is shown as having throughout its entire length the groove or channel 6 in which is represented as endwise-movable the normally-stationary rack-bar 7, ihe teeth of which are engageable by one or more teeth on the pawl or detent 8. This detent is shown as partially inc/losed by the sleeve 5 and as terminating at its upper end in a rounded head as 9 fitting in a correspondingly-shaped socket as 10 in the under side ol the movable jaw 4. Said pawl'S is shown as prol vided with a pin 11 surrounded by the coiled pushforce the teeth ol' the pawl 8 into engagement with the leeth ol' the .rack-bar .7 and to` also maintain suchengagement. The p'awl 8 is shown as being in engagement withA the rack-bar 7 to hold the jaw r4 in an adjusted position. To change the adjustment the paw] 8 is swung outward sufficiently-to disengage its teeth from those of the rack-bar 7, after which the jaw 4can be moved toward or from the companion jaw and, when the adjustment is effected, the pawl will be released and the spring 12 will move the teeth thereof4 Specification of Letters Patent.

l wfappusson fusa June 29,1907. semi No. 381,487.

Patented Oct. 1, 1907.

into engagement with those of the rack-bart@ hold the adjustment. To facilitate the operation of the pawl 8 Ait may7 as shown, be provided with an outwardlycurved finger-piece as 13. ,Y

A thimble-like nut 14 is shown as threaded on to the outer' end of the shank 2, and the purpose oi this nut is to advance the rack-bar 7 in opposition to a spring as 15 located in the channel 6 and active against said bar and head or jaw 3,'respectively. The spring, yas will be clear, tends at all timesto impart a retracting or outward longitudinal movement to the bar 7. The outer end of the bar 7 is shown as having a shoulder or enlargement as 16 between which and the bottom of the nut 14 several rollers as 17 may be interposed, and these rollers preferably take the form ofballs so as to'provide ior'an anti-frictional relation between thel nut l14 and bar 7l Prior to the adjustment of the wrench to an object, assuming that it is desired to use both adjustments thereof, the nut 14 is run out, after Awhich the jaw 4 is operated to grip the object to be turned. It will be assumed, oi course, that the ygrip is a free one and that it is desired that the same bedentallywholly unscrewed from the body portion 2 and thereby lost, and thel means illustrated for this purpose Will'now be set forth. A rod 20 is shown as extending along a channel as 2l formed in the outer end of the rack-bar 7, the outer vnd ol said channel being open and the rod projecting outwardly through said open end througha perforation in thc nut 14 and having a head 21 bearing againsl.- the bottom ol' a con-- cavity formed in the under side of lsaid nul..v The upper or inner end oi the-rod has a hook or laterally bent portion as 22 adapted to tra'vol in a groove 2', extending longitudinally of the body portion 2,111c hook beingadapted to engage the ends oi thc said groove or slot 23 When the nut 14 is at the limit ol' its opposite movements. To the under side ol' the nut I4 is pivotod a flap as 24 which when closed is adapted to extend across the head 2l. The rod 20, as will be undcrstoml, follows thc' rack-bar 7 as t'hc latter is movcd cndwisc by the nut 14, and it serves by abutting against the lo'wor end of the groove or slot 23 to prevent the complete separation of the nut from said body portion. A number oi variations muy bl,- atIopM-.d w'ithin the 'scope `of my claims. For instance, while l show' the bar 7 as spring-actuated in one direction, it is not essential that I provide such a spring .as 15 nor locate it in the place indicated, nor is il. novos-Tary that 'I provide a spring as l2. Iniention these as several details which may be deviated from Within the boundaries of my appended Claims` What I claim is:

1. A wrench embodying a shank having a fixed jaw and also having a longitudinally disposed channel, a rack-har fitted in said channeln'fol' endwlse movement, a thiniblelike nut tlnjeaded onto the outer end of the shank and op eiative for moving the' rack-hai` in an end-wise direction, a slidahle jaw on the shank; a pawl movahlewlth the sildahle jaw and badapted to engage the toothed poi-tion of the rack-hai', and a series of anti-friction rollers hearing against the bottom ofthe said nut and also bearing against the oui'ei` end of said rack-bar.

il. A wrench embodying a shank provided with a fixed jaw, a hai' cai-Pied by and movable longitudinally of said shank. a jaw slidable with respect to said har, means connected with said slidahle jaw for fixedly connecting the `mine with said hai', a nut in threaded relation with the shank for imparting an endwlse movement to said har, and a rod connected with the mit, extending longitudinally of said bar and provided with a lateral offsetv the shank having a longitudinal slot to receive said oii'set.r

3. A wrench embodying a shank provided with a fixed jaw, a rack-bar movably con'nected with said shank, u slidahie jaw on said shank, a'pawl on the slidabie jaw to engage the teeth of the i'ack-ha\., a nu't in threaded relation with the shank for imparting an advancing movement to said bar, and a `rod connected with the nut, extending lon gitudinaliy of said rack-bar, and provided with 4a lateral offset, the shank having a longitudinal slot to receive said offset.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.-

Witnesses z F. 1'. FoimnAN, G. H. Billen. 

